replaces #78

* a single h-entry and h-card, where the h-entry has no URL, will result in a permalink page with that h-entry
* multiple h-entrys followed by an h-card is a feed

including from rel=alternate

closes #73

parse from both link tags and the u-redirect-uri property

main difference is the deprecated rel handling

closes #13

closes #51

if an item has multiple URL values, return the one that is on the same domain

checkin data is returned embedded like author data rather than in the `refs` object

closes #35

thanks to the new backcompat in php-mf2 0.3.2

closes #24

* closes #23
* major refactor of the methods for extracting properties to consolidate the logic
* hReview parsing is incomplete due to issues with the php-mf2 backcompat parsing. see https://github.com/indieweb/php-mf2/issues/107

closes #16

If the input URL contains a fragment, finds the DOM tree at that ID and runs the subtree through the mf2 parser.

closes #15

closes #9

if a property such as `in-reply-to` is an h-cite, the URL is still returned as the `in-reply-to` value, and the h-cite object is available in a different part of the response.

closes #6